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085e831668
* Update package version * Update makefile targets * Update readme packages * Remaining old packages via rg/sd
119 lines
3.1 KiB
Go
119 lines
3.1 KiB
Go
package transformers
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import (
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"container/list"
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"fmt"
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"os"
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"strings"
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"github.com/johnkerl/miller/v6/pkg/cli"
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"github.com/johnkerl/miller/v6/pkg/lib"
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"github.com/johnkerl/miller/v6/pkg/mlrval"
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"github.com/johnkerl/miller/v6/pkg/types"
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)
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// ----------------------------------------------------------------
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const verbNameUTF8ToLatin1 = "utf8-to-latin1"
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var UTF8ToLatin1Setup = TransformerSetup{
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Verb: verbNameUTF8ToLatin1,
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UsageFunc: transformerUTF8ToLatin1Usage,
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ParseCLIFunc: transformerUTF8ToLatin1ParseCLI,
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IgnoresInput: false,
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}
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func transformerUTF8ToLatin1Usage(
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o *os.File,
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) {
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fmt.Fprintf(o, "Usage: %s %s, with no options.\n", "mlr", verbNameUTF8ToLatin1)
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fmt.Fprintf(o, "Recursively converts record strings from Latin-1 to UTF-8.\n")
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fmt.Fprintf(o, "For field-level control, please see the utf8_to_latin1 DSL function.\n")
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fmt.Fprintf(o, "Options:\n")
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fmt.Fprintf(o, "-h|--help Show this message.\n")
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}
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func transformerUTF8ToLatin1ParseCLI(
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pargi *int,
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argc int,
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args []string,
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_ *cli.TOptions,
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doConstruct bool, // false for first pass of CLI-parse, true for second pass
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) IRecordTransformer {
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// Skip the verb name from the current spot in the mlr command line
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argi := *pargi
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argi++
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for argi < argc /* variable increment: 1 or 2 depending on flag */ {
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opt := args[argi]
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if !strings.HasPrefix(opt, "-") {
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break // No more flag options to process
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}
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if args[argi] == "--" {
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break // All transformers must do this so main-flags can follow verb-flags
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}
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argi++
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if opt == "-h" || opt == "--help" {
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transformerUTF8ToLatin1Usage(os.Stdout)
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os.Exit(0)
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} else {
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transformerUTF8ToLatin1Usage(os.Stderr)
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os.Exit(1)
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}
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}
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*pargi = argi
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if !doConstruct { // All transformers must do this for main command-line parsing
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return nil
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}
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transformer, err := NewTransformerUTF8ToLatin1()
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if err != nil {
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fmt.Fprintln(os.Stderr, err)
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os.Exit(1)
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}
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return transformer
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}
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// ----------------------------------------------------------------
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type TransformerUTF8ToLatin1 struct {
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}
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func NewTransformerUTF8ToLatin1() (*TransformerUTF8ToLatin1, error) {
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tr := &TransformerUTF8ToLatin1{}
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return tr, nil
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}
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// ----------------------------------------------------------------
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func (tr *TransformerUTF8ToLatin1) Transform(
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inrecAndContext *types.RecordAndContext,
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outputRecordsAndContexts *list.List, // list of *types.RecordAndContext
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inputDownstreamDoneChannel <-chan bool,
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outputDownstreamDoneChannel chan<- bool,
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) {
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HandleDefaultDownstreamDone(inputDownstreamDoneChannel, outputDownstreamDoneChannel)
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if !inrecAndContext.EndOfStream {
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inrec := inrecAndContext.Record
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for pe := inrec.Head; pe != nil; pe = pe.Next {
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inval := pe.Value
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if inval.IsString() {
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output, err := lib.TryUTF8ToLatin1(pe.Value.String())
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if err == nil {
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pe.Value = mlrval.FromString(output)
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} else {
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pe.Value = mlrval.FromError(err)
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}
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}
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}
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outputRecordsAndContexts.PushBack(types.NewRecordAndContext(inrec, &inrecAndContext.Context))
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} else { // end of record stream
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outputRecordsAndContexts.PushBack(inrecAndContext)
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}
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}
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